1# build a top-level wrapper crate as a staticlib to link into lk.elf
2
3# collect paths for proc-macro deps with BUILDDIR for host libs
4WRAPPER_RUST_EXTERN_PATHS := $(foreach stem, $(ALL_KERNEL_HOST_CRATE_STEMS), $(stem)=$(TRUSTY_HOST_LIBRARY_BUILDDIR)/lib$(stem).so)
5
6# change BUILDDIR so RSOBJS for kernel are distinct targets from userspace ones
7OLD_BUILDDIR := $(BUILDDIR)
8BUILDDIR := $(BUILDDIR)/kernellib
9
10WRAPPER_RUSTFLAGS := --crate-type=staticlib
11
12# compute the set of rust module rlibs to depend on
13ALLMODULE_RLIBS := $(foreach stem, $(ALLMODULE_CRATE_STEMS), $(call TOBUILDDIR,lib$(stem).rlib))
14
15# topologically sort crates based on dependency order.
16
17# first, emit every pair of depender and dependency into $(CRATE_DEPS_FILE)
18CRATE_DEPS_FILE := $(BUILDDIR)/crate-dependencies
19$(CRATE_DEPS_FILE): $(ALLMODULE_RLIBS)
20	@$(MKDIR)
21	: > $(CRATE_DEPS_FILE)
22	$(foreach mod, $(ALLMODULE_CRATE_STEMS), $(foreach dep, $(MODULE_$(mod)_CRATE_DEPS), echo $(mod) $(dep) >> $(CRATE_DEPS_FILE);))
23
24# process these pairs with tsort to generate an ordering
25SORTED_CRATE_STEMS_FILE := $(BUILDDIR)/crate-dependency-ordering
26$(SORTED_CRATE_STEMS_FILE): $(CRATE_DEPS_FILE)
27	@$(MKDIR)
28	echo -n "ALLMODULE_CRATE_STEMS_SORTED := " > $(SORTED_CRATE_STEMS_FILE)
29	tsort < $(CRATE_DEPS_FILE) | tac | tr "\n" " " >> $(SORTED_CRATE_STEMS_FILE)
30
31# load our ordering in ALLMODULE_CRATE_STEMS_SORTED via include
32include $(SORTED_CRATE_STEMS_FILE)
33
34
35# build "--extern foo=/path/to/foo" flags for rustc
36WRAPPER_RUST_EXTERN_PATHS += $(foreach stem,$(ALLMODULE_CRATE_STEMS_SORTED),$(subst .,_,$(stem))=$(call TOBUILDDIR,lib$(stem).rlib))
37WRAPPER_RUSTFLAGS += $(addprefix --extern ,$(WRAPPER_RUST_EXTERN_PATHS))
38
39# generate a .rs source file for the wrapper crate
40# we must not explicitly "extern crate" core or compiler_builtins
41CRATES_TO_IMPORT := $(filter-out core compiler_builtins,$(ALL_KERNEL_HOST_CRATE_STEMS) $(ALLMODULE_CRATE_STEMS_SORTED))
42RUST_WRAPPER_SRC := \#![no_std] \
43    $(foreach crate, $(CRATES_TO_IMPORT), extern crate $(subst .,_,$(crate));)
44
45RUST_WRAPPER := $(BUILDDIR)/lk-crates.rs
46
47$(RUST_WRAPPER): RUST_WRAPPER_SRC := $(RUST_WRAPPER_SRC)
48$(RUST_WRAPPER): $(SORTED_CRATE_STEMS_FILE)
49	@$(MKDIR)
50	echo "$(RUST_WRAPPER_SRC)" > "$@"
51
52RUST_WRAPPER_OBJ := $(BUILDDIR)/lk-crates.a
53
54$(RUST_WRAPPER_OBJ): WRAPPER_RUSTFLAGS := $(WRAPPER_RUSTFLAGS)
55$(RUST_WRAPPER_OBJ): ARCH_RUSTFLAGS := $(ARCH_$(ARCH)_RUSTFLAGS)
56
57$(RUST_WRAPPER_OBJ): $(ALLMODULE_RLIBS) $(RUST_WRAPPER)
58	+$(NOECHO)$(RUSTC) $(GLOBAL_KERNEL_RUSTFLAGS) $(GLOBAL_SHARED_RUSTFLAGS) $(ARCH_RUSTFLAGS) $(WRAPPER_RUSTFLAGS) -o $@ $(RUST_WRAPPER)
59
60# if there were no rust crates, don't build the .a
61ifneq ($(ALLMODULE_CRATE_STEMS),)
62EXTRA_OBJS += $(RUST_WRAPPER_OBJ)
63endif
64
65CRATE_COUNT := 0
66
67$(foreach crate,$(ALLMODULE_CRATE_STEMS_SORTED),\
68	$(eval RUST_TOPLEVEL_$(crate)_CRATE_INDEX := $(CRATE_COUNT))\
69	$(eval CRATE_COUNT := $(shell echo $$(($(CRATE_COUNT)+1))))\
70)
71
72define CRATE_CONFIG =
73\t\t{\n
74	\t\t\t"display_name": "$(crate)",\n
75	\t\t\t"root_module": "$(abspath $(filter %.rs,$(MODULE_$(crate)_RUST_SRC)))",\n
76	\t\t\t"edition": "$(MODULE_$(crate)_RUST_EDITION)",\n
77	\t\t\t"deps": [\n
78		$(call STRIP_TRAILING_COMMA,$(foreach dep,$(sort $(MODULE_$(crate)_CRATE_DEPS)),\
79			\t\t\t\t{\n
80			\t\t\t\t\t"name": "$(dep)"$(COMMA)\n
81			\t\t\t\t\t"crate": $(RUST_TOPLEVEL_$(dep)_CRATE_INDEX)\n
82			\t\t\t\t}$(COMMA)\n))
83	\t\t\t],\n
84	\t\t\t"cfg": [\n
85		$(call STRIP_TRAILING_COMMA,$(foreach f, $(MODULE_$(crate)_CRATE_CFG),\
86			\t\t\t\t"$(subst ",\\\\\\\",$(f))"$(COMMA)\n))
87	\t\t\t]\n
88\t\t},\n
89
90endef
91
92RUST_ANALYZER_CONTENTS := $(foreach crate,$(ALLMODULE_CRATE_STEMS_SORTED),$(CRATE_CONFIG))
93
94include make/rust-project-json.mk
95
96# restore BUILDDIR
97BUILDDIR := $(OLD_BUILDDIR)
98
99CRATE_COUNT :=
100CRATE_CONFIG :=
101RUST_ANALYZER_CONTENTS :=
102RUST_WRAPPER_SRC :=
103WRAPPER_RUSTFLAGS :=
104WRAPPER_RUST_EXTERN_PATHS :=
105ALLMODULE_CRATE_STEMS_SORTED :=
106